1 of 25
An example of a community is
|one giant individual kelp.|
|a kelp forest plus all of the physical factors affecting it.|
|all physical factors affecting a kelp forest.|
|a kelp forest plus all organisms living in it.|
|several giant kelp individuals living in one particular area.|
Question 2 of 25 Competitive exclusion can be best defined as
|when one species overcompetes and eliminates another.|
|the creation of a separate ecological niche by a new species.|
|the division of resources.|
|when one species shares limiting resources with another.|
|when competition results in the elimination of particular limiting resources.|
Question 3 of 25 The ecological niche of a species refers to which of the following?
|Position of the organism in the food web|
|Role in the community|
|Mode of reproduction and food habits|
|Behavior in relation to other species in the community|
Question 4 of 25 Zooxanthellae live within the tissues of corals, and both organisms benefit from the association. This is known as
Question 5 of 25 Which of the following best describes cleaning symbiosis?
|Both partners are not harmed.|
|Both are harmed if one closely studies their association.|
|Both have coevolved into a close association|
|One is harmed while the other is not.|
|One species benefits while the other is unaffected.|
Question 6 of 25 The difference between food webs and food chains is that food webs
|consist of only one trophic level.|
|include primary producers as well as consumers.|
|do not take into account predators.|
|only outline feeding relationships among consumers.|
|are more complex.|
Question 7 of 25 The next level in a food web beyond the producers would be the
Question 8 of 25 Which of the following could be a tertiary consumer?
Question 9 of 25 On average, what percentage of energy in a particular trophic level is passed on to the next trophic level?
Question 10 of 25 Detritus in the water includes
|dead organic matter.|
|waste products dissolved in water.|
|smallest plankton-feeding fishes.|
Question 11 of 25 A fundamental role of decomposers is
|releasing nutrients to be used by autotrophs.|
|providing food for carnivores.|
|providing energy for autotrophs.|
Question 12 of 25 Net primary productivity is best defined as the
|total amount of biomass created by producers.|
|total amount of biomass created by producers after energy loss to metabolism is factored.|
|total biomass of producers in the water in a given habitat.|
|total biomass of producers in the ocean.|
|None of the above.|
Question 13 of 25 The amount of chlorophyll in the water is a direct estimate of
|standing stock of phytoplankton.|
|release of nutrients.|
Question 14 of 25 In the carbon cycle, seaweeds and plants play a fundamental role by
|increasing the amount of dissolved carbon dioxide as a result of decomposition.|
|decreasing the amount of dissolved carbon dioxide as a result of respiration.|
|increasing the amount of dissolved carbon dioxide as a result of photosynthesis.|
|decreasing the amount of detritus.|
|both increasing the amount of dissolved carbon dioxide as a result of respiration, and decreasing it as a result of photosynthesis.|
Question 15 of 25 Nitrogen fixation is performed at sea by
|All of the above choices are correct.|
Question 16 of 25 Which of the following is an example of intraspecific competition?
|Two species of barnacles competing for space on a rocky shoreline|
|Two species of dolphins feeding on the same population of fish|
|Two individuals in a population of clownfish attempting to use the same anemone as habitat|
|Two species of fish attempting to use the same rocky ledge as habitat|
|Two species of seals fighting over space on a beach to rear their young|
Question 17 of 25 A population's carrying capacity is
|affected by the growth rate of the population.|
|the number of individuals a habitat can support with available resources.|
|a constant that has been predetermined for all habitats.|
|the number of individuals in a habitat.|
|determined by comparing birth rate and death rate in a population.|
Question 18 of 25 In competitive exclusion, which of the following is true?
|Two species cannot coexist in a habitat.|
|One species is a better competitor for resources.|
|It leads to intraspecific competition.|
|It results from intraspecific completion.|
|It leads to population growth for both competitors.|
Question 19 of 25 In a salt marsh, a fish eats decaying material from around the base of Spartina grass plants. A snail scrapes algae from the stalks of the Spartinagrass. These species can coexist because they have which of the following?
|The same niche, but different habitat|
|The same habitat and the same niche|
|The same habitat, but different niche|
|Different habitats and different niches|
|None of the above|
Question 20 of 25 Which of the following gasses is NOT considered to be a major greenhouse gas?
Question 21 of 25 The increase in atmospheric carbon dioxide is a direct result of ___________________.
|too many marine animals dying|
|rising sea levels along the coast|
|predation on coral reefs|
Question 22 of 25 Significant consequences of global warming include_____________.
|rising sea levels|
|plants flowering sooner in the year|
|penguins moving closer to the South Pole|
|an increase in coral bleaching|
|All of the above|
Question 23 of 25 Which of the following is a direct chemical consequence of rising carbon dioxide levels in oceans?
|There will be more water.|
|More phytoplankton will be found near shorelines.|
|Populations of large mammals will increase.|
|Acidification of the oceans.|
|Coral reefs will flourish.|
Question 24 of 25 Which of the following is NOT likely to happen as global warming continues?
|More water vapor will enter the atmosphere.|
|Sea levels will fall exposing more coral reefs.|
|The Great Ocean Conveyor circulation will be disrupted.|
|Greenland could melt.|
|Methane could be released from ocean sediments.|
Question 25 of 25 Excessive algae growth as a result of increased nitrogen in water is referred to as _________________.